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Identify the various layers of the earth in order from interior to the outermost layer :

ACrust, Mantle, Outer core, Inner core

BMantle, Crust, Outer core, Inner core

CInner core, Outer core, Mantle, Crust

DOuter core, Crust, Mantle, Inner core

Answer:

C. Inner core, Outer core, Mantle, Crust

Read Explanation:

Spheres of the earth

  • Based on the analysis of the structure & composition generated during earthquakes, the Earth has been divided into different layers.

  • Crust

  • Mantle

  • Outer core

  • Inner core

Crust

  • The comparatively thin outer shell of the earth.

  • Approximately 10 km thick

  • Two parts – Continental crust, oceanic crust.

  • The continental crust is made of granitic, metamorphic, and sedimentary rocks. It's sometimes called sial because it's rich in aluminum silicates (Al-Si)

  • Oceanic crust differs from continental crust in several ways: it is thinner, denser, younger, and of different chemical composition.

Mantle

  • Located beneath the curst.

  • Extended upto 2900km from the crust

  • Two parts - upper mantle, lower mantle.

Upper mantle

  • This layer is made up of solid and molten rock, and extends from the Earth's crust to a depth of 255 miles. It contains two parts: the asthenosphere, which is a transition zone of semi-molten rock, and the lithosphere, which contains the tectonic plates

Lower mantle

  • This layer is located directly above the outer core, and is made up of solid rock that's around 7,000° F in temperature. It's hotter and denser than the upper mantle, and is less ductile. The intense pressure in the lower mantle keeps it solid, despite the high temperatures

Core

  • Central part of the earth

  • From 2900km to 6371 km

  • Two parts - outer core, inner core

  • Inner core - Solid, with a radius of 1,216 km. The inner core is under intense pressure, which keeps it solid despite its high temperature

  • Outer core - Liquid, with a thickness of about 1,300 miles (2,092 km). The outer core is liquid because there isn't enough pressure to keep it solid.

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